Presser foot for sewing machines



May 2, 1939. o. MOHN PRESSER ,FOOT FOR SEWING MACHINES- Fi'led April 27, 1937 P Sheets-Sheet 1 INVENTOR OT TO M OHN B M, 6m )JW ATTORNEYS May 2, O. MoHN PRESSER FOOT FOR SEWING MACHINES Filed Ap 27. 1957 2 Sheets-Sheet 2 Fyui 7 (Z 5 F l PuvE ToR OTTo. MIOHN V v47 BY ATiORNEYS Patented May 2, 1939 UNITED STATES PATENT OFFICE PRESSER FOOT FOR SEWING MACHINES Otto Mohn, 'Stulttgart, Germany, assignor to Mauser-Werke A.-G., Oberndorf-on-the-Neckar, Germany, a joint-stock company of Germany Application April 27, 1937, Serial No. 139,313 In Germany April 16, 1936 4 Claims. (01. 112235) This invention relates to a presser foot for An additional advantage of the arrangement sewing machines of any desired design, and refers according to the invention consists in the fact to a presser foot having resilient runners which that by reason of the resilient runners there is are capable of yielding upon the occurrence of also a compensation of diiferences in the elevated transverse seams or other thickened portions of position of the material feeder.

the material so as to permit of a proper feeding Any desired additional resiliency may be obof the material. tained by differences in the size of cross-section It has already been proposed to employ, when of the runners or by the provision of additional transverse seams are to be dealt with, presser springs on the upper side or lower inner side of feet which are furnished with resilient side porthe runners, so that the possibility exists of ex- 10 tions guided in pins. Presser feet having side tensive adaptation to any kind of sewing. portions are also known which are rotatable An example of the invention is illustrated in about a stud and in which the side portions are the drawing in adaptation to a two-needle presser pressed downwards by a spring. These known foot. The invention is not limited to this form 5 arrangements are accompanied by the disadvanof embodiment, but may be employed on any tage that upon the occurrence of transverse kind of sewing machine. In the drawings seams the material situated in front of or behind Fig; 1 is an elevational view of the presser the seam is not pressed down sufliciently owing foot, the material feeder and the throat plate, to a lifting of the side portions, so that a proper the feeder being situated in the operative posifeeding of the material is unable to take place. tion. 20

It has also already been proposed to secure on Fig. 2 is a plan view of the presser foot, the presser foot resilient bars by means of screws Fig. 3 a front view of Fig. 1, and and rigidly attached to the presser foot and Fig. 4 an elevational view of the presser foot which are merely hollow at the centre, so that in the unloaded condition.

they are resilient at this point only. The attach- Figs. 5 to 8 are elevational views of the presser 25 ment of t se ba s t the front of the Presser foot, the material feeder and the throat plate foot takes place by means of a normal fiatwith pieces of work having a transverse seam in headed screw, whilst at the rear end of the different positions, viz. in presser foot an abutment screw enables the end Fig. 5 at the commencement of the presser of the bar to yield longitudinally. Owing to the foot, in 30 fact that the bars bear tightly against the Fig. 6 at the centre of the presser foot, i. e., Presser feel? at the from? and the ear they are below the point of attachment of the runners, in unable to yield at these points. Fig. '7 at the end of the presser foot, and in These disadvantages associated with the known Fig. 8 without transverse seam. a a e are avoided y the inventien- Fig. 9 is a vertical section along the line AA 35 cording to the invention, there are provided on i Fig, 1,

both sides of the presser foot to the right and the To the bottom portion a of the presser foot b left resilient runners, each of which is secured to there are screwed in each case to the right and the presser foot by means of a screw. Owing to the left by means of the screws 0 and d a runner e the fact that these runners have an intermediate and 1. Each runner consists of one piece and 40 40 Space which is greater than the thickness of the the two ends are superimposed at the point of lower foot portion these runners are resilient in attachment (compare Figs. 1 and 2). These themselv s at l p n and ar a r i gly rea runners are so dimensioned that their intermeily able to adapt themselves at all points to the diate space 9 (Fig. 9) is greater than the thickpiece of work. Moreover since the runners each ness h of the lower portion of the presser foot,

45 consist of one piece and their attachment is so that the runners are capable of resiliency at effected in each case solely by means of one all points dependent on the position of the transscrew at the centre of the presser foot the reverse seam (Figs. 5 to 7). To permit of lateral siliency of the runners is equal in front of and guiding of the runners, and accordingly to prebehind the P011111 0f attachmentand accordingly vent a rotation of the same, the lower portion a 50 at all points. of the presser foot is reduced at 1' corresponding In order to afford the runners a lateral guiding to the thickness of the material of the runners, and accordingly to prevent a rotation of the same so that the underside of the presser foot conthe bottom portion of the presser foot is reduced stitutes a flat surface. Further, the upper side along the runners. of the lower foot portion is reduced at is. 55

Having now particularly described and ascertained the nature of my said invention, and in what manner the same is to be performed, I declare that what I claim is:

1. A presser foot for sewing machines comprising a bottom portion, at least one resilient runner mounted on the said bottom portion, the said runner constituting a complete resilient band entirely embracing the bottom portion, and a single fastening means connected to the runner and inserted into the upper side of the bottom portion.

2. A presser foot for sewing machines comprising a bottom portion, a resilient runner mounted at each side of the bottom portion, each of the runners being in the form of a complete resilient band entirely embracing the bottom portion, and a single fastening means connected to each runner and inserted into the upper side of the bottom portion.

3. A presser foot for sewing machines comprising a bottom portion having at least one offset part on the upper and lower sides thereof, at

least one resilient runner mounted on the bottom portion adjacent the off-set parts, the said runner being in the form of a complete resilient band entirely embracing the bottom portion, and a single fastening means connected to the bottom portion and securing the runner on the bottom portion, the off-set parts guiding the said runner laterally on the bottom portion.

4. A presser foot for sewing machines comprising a bottom portion, and at least one resilient runner mounted on said bottom portion and constituting a complete resilient band entirely embracing the bottom portion but spaced from the bottom surface of the bottom portion in the non-contacting position of the presser foot, said runner being secured on the upper surface of the bottom portion to prevent travel of the runner on the bottom portion when material being sewed is fed under the presser foot and to permit the runner to yield only in the vertical direction.

OTTO MOHN. 

